Armature, and method of manufacturing armature

Abstract

To provide an armature capable of improving productivity of an armature core and suppressing an increase in an iron loss of the armature core, and a method of manufacturing an armature.SOLUTION: In an armature 5, an armature core 51 is configured by laminating a plurality of magnetic plates 511. The armature core 51 includes a yoke 56 and a plurality of teeth 57 provided in the yoke 56 while being spaced apart from each other. A plurality of holding members 53 are formed in an endless shape from an elastic material having an electric insulation property. To each of the teeth 57, the holding members 53 are individually mounted. The holding members 53 integrate the plurality of magnetic plates 511 by generating elastic restoration forces for fastening the teeth 57 in a state where the teeth 57 are inserted inside of the holding members 53.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to armatures and methods of manufacturing armatures. [Background technology]

[0002] Patent Document 1 discloses an iron core for an electric machine having an iron core component formed by restraining a laminate of multiple metal foil strips with a holding member, which is made of adhesive tape, a resin molded body, a heat-shrinkable material, or a metal clip. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-8588 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional iron core for electric machines disclosed in Patent Document 1, if adhesive tape is used as a holding member, time is required for the adhesive to harden, which reduces the productivity of the iron core for electric machines. Furthermore, if a resin molded body is used as a holding member, the work of fitting the resin molded body into the laminate is time-consuming, which reduces the productivity of the iron core for electric machines. Furthermore, if a heat-shrinkable material is used as a holding member, the work of thermally shrinking the heat-shrinkable material is required, which reduces the productivity of the iron core for electric machines. Furthermore, if a metal clip is used as a holding member, multiple metal foil strips are electrically connected to each other via the metal clip, which tends to increase eddy currents generated in the laminate, and increases iron loss in the iron core for electric machines.

[0005] The present disclosure is devised to solve the above-described problems, and aims to provide an armature and an armature manufacturing method that can improve the productivity of armature cores and suppress an increase in iron loss in the armature cores. [Means for solving the problem]

[0006] The armature of the present disclosure comprises an armature core formed by stacking a plurality of magnetic plates, a plurality of retaining members provided on the armature core and integrating the plurality of magnetic plates, and an armature winding provided on the armature core, wherein the armature core has a yoke portion and a plurality of teeth provided on the yoke portion at intervals from each other, and each retaining member is formed endlessly from an elastic material having electrical insulation properties, and a retaining member is individually attached to each tooth portion, and each retaining member integrates the plurality of magnetic plates by generating an elastic restoring force that tightens the tooth portion when the tooth portion is inserted inside the retaining member. In addition, the method for manufacturing an armature according to the present disclosure includes a lamination process for laminating a plurality of magnetic plates to form an armature core having a yoke portion and a plurality of tooth portions spaced apart from one another on the yoke portion; a retaining member attachment process for attaching, after the lamination process, endless retaining members formed from an electrically insulating elastic material to each tooth portion individually; and a winding process for providing an armature winding on the armature core after the retaining member attachment process. In the retaining member attachment process, the teeth are inserted inside the retaining member while stretching it, and then an elastic restoring force is generated in the retaining member that tightens the teeth portions, thereby integrating the plurality of magnetic plates. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to improve the productivity of armature cores and suppress an increase in iron loss in the armature cores. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a partial cross-sectional view showing a rotating electric machine according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view showing the armature of FIG. [Figure 3] 3 is an enlarged view showing a teeth portion of the armature core of FIG. 2. [Figure 4]4 is a front view showing the teeth portion of FIG. 3 as viewed from the radially inner side of the armature. [Figure 5] 5 is a flowchart showing a method for manufacturing the armature according to the first embodiment. [Figure 6] 6 is an enlarged view showing a state in which the holding member has been released from the teeth and has contracted before the holding member attaching step S2 in FIG. 5. FIG. [Figure 7] 7 is a front view showing the holding member and the teeth portion of FIG. 6 as viewed from the radially inner side of the armature core. FIG. [Figure 8] 7 is an enlarged view showing a state in which the holding member of FIG. 6 is stretched in the holding member attaching step S2. [Figure 9] 9 is a front view showing the retaining member and the teeth portion of FIG. 8 as viewed from the radially inner side of the armature core. [Figure 10] 9 is an enlarged view showing a state in which the teeth are inserted into the holding member of FIG. 8. FIG. [Figure 11] 11 is an enlarged view showing a state in which the holding member in FIG. 10 is attached to the teeth portion. FIG. [Figure 12] 12 is a front view showing the holding member and the teeth portion of FIG. 11 as viewed from the radially inner side of the armature core. FIG. [Figure 13] FIG. 11 is an enlarged cross-sectional view showing a main part of an armature according to a third embodiment. [Figure 14] FIG. 14 is a cross-sectional view taken along line XIV-XIV in FIG. [Figure 15] 14 is an enlarged cross-sectional view showing a state in which a bobbin is attached to the teeth portion of FIG. 13. FIG. [Figure 16] FIG. 11 is an enlarged cross-sectional view showing a main part of an armature according to a third embodiment. [Figure 17] 17 is an enlarged cross-sectional view showing a state in which the holding member of FIG. 16 is attached to the teeth portion in a holding member attaching step S2. FIG. [Figure 18] FIG. 10 is an enlarged cross-sectional view showing a main part of an armature according to a fourth embodiment. [Figure 19] 19 is an enlarged cross-sectional view showing a state when the holding member of FIG. 18 is attached to the teeth portion in a holding member attaching step S2. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] The following describes embodiments of the subject matter of the present disclosure with reference to the accompanying drawings. In each drawing, identical or corresponding parts are designated by the same reference numerals, and redundant explanations are appropriately simplified or omitted. Note that the subject matter of the present disclosure is not limited to the following embodiments, and any component of the embodiments may be modified or omitted within the scope of the gist of the present disclosure.

[0010] Embodiment 1 1 is a partial cross-sectional view showing a rotating electric machine according to embodiment 1. The rotating electric machine 1 as an electric device has a housing 2, a main shaft 3, a rotor 4, and an armature 5.

[0011] The housing 2 has a tubular portion 21 and a plate-like portion 22. The tubular portion 21 has a cylindrical shape with an axis. The plate-like portion 22 is fixed to an end of the tubular portion 21 in the axial direction of the tubular portion 21. The plate-like portion 22 closes one opening of the tubular portion 21.

[0012] The main shaft 3 is fixed to the plate-like portion 22 of the housing 2. The main shaft 3 is disposed inside the cylindrical portion 21 and coaxially with the cylindrical portion 21. As a result, the main shaft 3 is disposed on the axis of the cylindrical portion 21.

[0013] The rotor 4 is supported as a mover on the main shaft 3. The rotor 4 is rotatably attached to the main shaft 3 via bearings 6. This allows the rotor 4 to rotate relative to the housing 2 and the main shaft 3, inside the cylindrical portion 21, around the axis of the main shaft 3.

[0014] The rotor 4 has a rotor core 41 and a plurality of permanent magnets 42. The rotor core 41 is made of a magnetic material. The rotor core 41 is cylindrical in shape. A through hole 43 is provided in the center of the rotor core 41, through which the main shaft 3 passes. The bearing 6 is interposed between the inner peripheral surface of the through hole 43 and the outer peripheral surface of the main shaft 3. The rotor core 41 is arranged coaxially with the main shaft 3.

[0015] A plurality of permanent magnets 42 are provided on the rotor core 41. The plurality of permanent magnets 42 are arranged at intervals in the circumferential direction of the rotor 4, whereby a plurality of magnetic poles are formed on the outer periphery of the rotor 4.

[0016] Note that a squirrel-cage rotor, a wound rotor, or the like may also be used as the rotor 4. A squirrel-cage rotor is a rotor in which a plurality of uninsulated rotor conductors are provided on a rotor core 41, and a pair of short-circuit rings arranged at both ends of the rotor core 41 are short-circuited by each rotor conductor. A wound rotor is a rotor in which a rotor winding that is electrically insulated from the rotor core 41 is provided on the rotor core 41.

[0017] The armature 5 is fixed to the housing 2 while being fitted onto the inner peripheral surface of the cylindrical portion 21. The armature 5 is annular in shape. The armature 5 surrounds the outer peripheral portion of the rotor 4. As a result, the inner peripheral portion of the armature 5 faces the outer peripheral portion of the rotor 4 via a gap. The armature 5 is arranged coaxially with the main shaft 3.

[0018] Fig. 2 is a cross-sectional view showing the armature 5 of Fig. 1. The armature 5 has an armature core 51, an armature winding 52, a plurality of holding members 53, a plurality of first insulating films 54, and a plurality of second insulating films 55.

[0019] The armature core 51 has a yoke portion 56 and a plurality of teeth 57. The shape of the yoke portion 56 is annular and follows the circumferential direction of the armature 5. The circumferential direction of the armature 5 is a direction along the circumference of a circle centered on the axis of the armature 5. The outer peripheral surface of the yoke portion 56 fits into the inner peripheral surface of the cylindrical portion 21 of the housing 2.

[0020] The multiple teeth 57 are provided on the yoke portion 56 at intervals from one another. The multiple teeth 57 are arranged at equal intervals in the circumferential direction of the armature 5. As a result, spaces are formed as slots 58 between the multiple teeth 57. Each tooth 57 protrudes from the yoke portion 56 toward the inside in the radial direction of the armature 5. The radial direction of the armature 5 is the direction along the radius of a circle centered on the axis of the armature 5.

[0021] As shown in FIG. 1, the armature core 51 is configured by stacking a plurality of magnetic plates 511. Each magnetic plate 511 is made of a magnetic material. In this embodiment, electromagnetic steel plates are used as the magnetic plates 511. The plurality of magnetic plates 511 are stacked in the axial direction of the armature 5. Therefore, the stacking direction of the plurality of magnetic plates 511 is a direction perpendicular to both the circumferential direction and the radial direction of the armature 5. The plurality of magnetic plates 511 are stacked without being joined to each other.

[0022] Here, Fig. 3 is an enlarged view showing the teeth portion 57 of the armature core 51 of Fig. 2. Fig. 4 is a front view showing the teeth portion 57 of Fig. 3 as viewed from the radial inside of the armature 5. As shown in Fig. 4, each magnetic plate 511 has a yoke constituent plate portion 511a and a plurality of teeth constituent plate portions 511b.

[0023] The yoke constituent plate portion 511a is an annular plate. The tooth constituent plate portion 511b protrudes from the yoke constituent plate portion 511a radially inward of the yoke constituent plate portion 511a on the same plane as the yoke constituent plate portion 511a. The yoke portion 56 is formed by stacking the yoke constituent plate portions 511a. The tooth portion 57 is formed by stacking the tooth constituent plate portions 511b.

[0024] 3, each tooth portion 57 has a tooth main body portion 571 and a tooth tip portion 572. The tooth main body portion 571 protrudes from the yoke portion 56 toward the inside of the yoke portion 56 in the radial direction of the armature 5. In each tooth portion 57, if the direction in which the tooth main body portion 571 protrudes from the yoke portion 56 is defined as the teeth protruding direction, the cross-sectional shape of each of the tooth main body portion 571 and the tooth tip portion 572 in a plane perpendicular to the teeth protruding direction is rectangular. In this embodiment, the cross-sectional area of ​​the tooth main body portion 571 in a plane perpendicular to the teeth protruding direction is the same at any position in the teeth protruding direction.

[0025] Tooth tip portions 572 are provided at protruding ends of tooth main body portions 571. The protruding ends of tooth main body portions 571 are the ends located farther from yoke portion 56 than both ends of tooth main body portions 571 in the tooth protruding direction.

[0026] A portion of each tooth tip portion 572 protrudes outward from each tooth main body portion 571 in the circumferential direction of the armature 5. As a result, the cross-sectional area of ​​each tooth tip portion 572 in a plane perpendicular to the tooth protruding direction is larger than the cross-sectional area of ​​each tooth main body portion 571 in a plane perpendicular to the tooth protruding direction. Each tooth tip portion 572 of each tooth portion 57 faces the outer periphery of the rotor 4 with a gap therebetween.

[0027] As shown in Fig. 2, the armature winding 52 is provided on the armature core 51. The armature winding 52 is wound around each tooth portion 57. A portion of the armature winding 52 is disposed in each slot 58. A rotating magnetic field is generated in the armature 5 when current is applied to the armature winding 52. The generation of the rotating magnetic field causes the rotor 4 to rotate about the axis of the main shaft 3 relative to the armature 5 and the housing 2.

[0028] A plurality of holding members 53 are provided on the armature core 51. The holding members 53 are attached to the respective teeth 57 individually.

[0029] Each holding member 53 is made of an electrically insulating elastic material and is formed in an endless shape. For example, a rubber circular belt is used as the holding member 53. Each holding member 53 is elastically stretchable. When each holding member 53 is stretched, it generates an elastic restoring force in the contracting direction.

[0030] Each holding member 53 is attached to the tooth portion 57 with the tooth portion 57 inserted inside the holding member 53. A tooth main body portion 571 is inserted inside each holding member 53. In this way, the holding member 53 is attached to the tooth main body portion 571 of each tooth portion 57.

[0031] Each holding member 53 is elastically stretched by being pushed open by the tooth main body 571 from inside the holding member 53. Therefore, each holding member 53 generates an elastic restoring force that fastens the tooth portion 57 in a state in which the tooth portion 57 is inserted inside the holding member 53. As a result, each holding member 53 integrates multiple magnetic plates 511. Therefore, each holding member 53 maintains the stacked state of multiple magnetic plates 511.

[0032] Each holding member 53 is interposed between the tooth main body 571 and the armature winding 52. The electrical insulation between each tooth main body 571 and the armature winding 52 is ensured by each holding member 53.

[0033] Each of the first insulating films 54 and each of the second insulating films 55 is an insulating component made of an electrically insulating material. A pair of first insulating films 54 and a pair of second insulating films 55 are attached to each of the holding members 53. In the present embodiment, the first insulating films 54 and the second insulating films 55 are attached to each of the holding members 53 by welding or the like. In the armature core 51, the first insulating films 54 and the second insulating films 55 face portions adjacent to each of the holding members 53, respectively.

[0034] Of the two ends of the holding member 53 in the tooth protruding direction, a pair of first insulating films 54 are attached as yoke-side insulating components to the end on the yoke portion 56 side. The pair of first insulating films 54 attached to the holding member 53 are individually arranged on both sides of the tooth portion 57 in the circumferential direction of the armature 5. As a result, each first insulating film 54 is interposed between the yoke portion 56 and the armature winding 52. The electrical insulation between the yoke portion 56 and the armature winding 52 is ensured by each first insulating film 54.

[0035] Of the two ends of the holding member 53 in the tooth protruding direction, a pair of second insulating films 55 are attached to the end on the tooth tip portion 572 side as tooth tip-side insulating components. The pair of second insulating films 55 attached to the holding member 53 are individually arranged on both sides of the tooth portion 57 in the circumferential direction of the armature 5. As a result, each second insulating film 55 is interposed between the tooth tip portion 572 and the armature winding 52. The electrical insulation between the tooth tip portion 572 and the armature winding 52 is ensured by each second insulating film 55.

[0036] Therefore, electrical insulation between the armature core 51 and the armature winding 52 is ensured by the holding members 53, the first insulating films 54, and the second insulating films 55.

[0037] Next, a method for manufacturing the armature will be described. Fig. 5 is a flowchart showing a method for manufacturing the armature according to the first embodiment. The method for manufacturing the armature includes a lamination step S1, a holding member attachment step S2, an insulation treatment step S3, and a winding step S4. When manufacturing the armature 5, the lamination step S1, the holding member attachment step S2, the insulation treatment step S3, and the winding step S4 are carried out in this order.

[0038] <Lamination process S1> A lamination step S1 is carried out when manufacturing the armature 5. In the lamination step S1, a plurality of magnetic plates 511 are laminated to form the armature core 51.

[0039] Each magnetic plate 511 is prepared in advance by punching out from a raw material plate made of a magnetic material. In the lamination step S1, as shown in Figures 3 and 4, the yoke constituent plate portions 511a of the magnetic plates 511 are stacked on each other and the tooth constituent plate portions 511b of the magnetic plates 511 are stacked on each other to stack the multiple magnetic plates 511.

[0040] When multiple magnetic plates 511 are stacked in the stacking step S1, the portion where yoke constituent plate portions 511a are stacked becomes yoke portion 56, and the portion where tooth constituent plate portions 511b are stacked becomes tooth portion 57. This produces armature core 51. In the stacking step S1, multiple magnetic plates 511 are stacked without joining the individual magnetic plates 511 to each other.

[0041] <Holding member attachment process S2> After the stacking step S1, a holding member attaching step S2 is performed. In the holding member attaching step S2, the holding members 53 are attached to the respective teeth 57 individually.

[0042] Fig. 6 is an enlarged view showing a state in which the retaining member 53 has detached from the tooth portion 57 and is contracted before the retaining member attachment step S2 in Fig. 5. Fig. 7 is a front view showing the retaining member 53 and the tooth portion 57 in Fig. 6 as viewed from the radial inside of the armature core 51. In the state in which the retaining member 53 has detached from the tooth portion 57 and is contracted, the area of ​​the region surrounded by the endless retaining member 53 is smaller than the cross-sectional area of ​​the tooth main body portion 571 in a plane perpendicular to the tooth protruding direction. Therefore, in the retaining member attachment step S2, the retaining member 53 is attached to the tooth portion 57 while being stretched.

[0043] Fig. 8 is an enlarged view showing a state in which the holding member 53 of Fig. 6 is stretched in the holding member attachment step S2. Fig. 9 is a front view showing the holding member 53 and the teeth 57 of Fig. 8 as viewed from the radially inner side of the armature core 51. In the holding member attachment step S2, the holding member 53 is stretched against its elastic restoring force until the area surrounded by the holding member 53 becomes larger than the outer shape of the teeth 57 when viewed along the tooth protruding direction. Thereafter, in the holding member attachment step S2, the teeth 57 are inserted into the inside of the holding member 53 while the holding member 53 is being stretched.

[0044] Fig. 10 is an enlarged view showing a state in which the teeth 57 are inserted inside the holding member 53 of Fig. 8. In the holding member attachment step S2, the teeth 57 are inserted inside the holding member 53 until the position of the holding member 53 reaches the position of the tooth main body 571. Thereafter, in the holding member attachment step S2, the force stretching the holding member 53 is removed from the holding member 53, and the holding member 53 is contracted by the elastic restoring force of the holding member 53, thereby attaching the holding member 53 to the teeth 57.

[0045] 11 is an enlarged view showing the retaining member 53 of FIG. 10 attached to the tooth portions 57. FIG. 12 is a front view showing the retaining member 53 and the tooth portions 57 of FIG. 11 as viewed from the radially inner side of the armature core 51. When the retaining member 53 is attached to the tooth portions 57, the retaining member 53 generates an elastic restoring force that fastens the tooth portions 57 from around the tooth main body portions 571. Thus, in the retaining member attachment step S2, the teeth 57 are inserted into the retaining member 53 while stretching the retaining member 53, and then an elastic restoring force that fastens the teeth 57 is generated in the retaining member 53. This integrates the multiple magnetic plates 511.

[0046] <Insulation processing step S3> After the holding member attaching step S2, an insulating step S3 is performed in which a first insulating film 54 and a second insulating film 55 are attached to each holding member 53 as insulating components.

[0047] In the insulation process S3, a pair of first insulating films 54 are attached to the end of the holding member 53 on the yoke portion 56 side. As a result, the first insulating films 54 face the inner circumferential surface of the yoke portion 56 on both sides of the teeth portion 57 in the circumferential direction of the armature core 51.

[0048] In the insulation process S3, a pair of second insulating films 55 are attached to the end of the holding member 53 on the tooth tip portion 572 side. As a result, the second insulating films 55 face the side surfaces of the tooth tip portions 572 on both sides of the tooth portions 57 in the circumferential direction of the armature core 51. Therefore, the first insulating film 54 and the second insulating film 55 face the portions of the armature core 51 adjacent to each holding member 53.

[0049] <Winding process S4> After the insulation process S3, a winding process S4 is carried out. In the winding process S4, the armature winding 52 is provided on the armature core 51 so that the holding members 53 are interposed between the armature winding 52 and the teeth 57. In the present embodiment, the armature winding 52 is provided on the armature core 51 by winding a conductor around each tooth 57. As a result, the armature winding 52 is provided on each tooth 57 via the holding members 53, as shown in FIG. 2 . In each slot 58, a first insulating film 54 is interposed between the yoke portion 56 and the armature winding 52, and a second insulating film 55 is interposed between the tooth tip portions 572 and the armature winding 52. In this manner, the armature 5 is manufactured.

[0050] In this armature 5, a retaining member 53 is attached to each tooth 57. Each retaining member 53 is endless and made of an electrically insulating elastic material. Each retaining member 53 generates an elastic restoring force that tightens the teeth 57 when the teeth 57 are inserted inside the retaining member 53, thereby integrating the magnetic plates 511. Therefore, the magnetic plates 511 can be easily integrated simply by attaching the retaining member 53 to each tooth 57 and generating an elastic restoring force in each retaining member 53. This allows the magnetic plates 511 to be integrated without using adhesives or heat-shrinkable materials, eliminating the time required for curing the adhesive and for thermally shrinking the heat-shrinkable materials. This improves the productivity of the armature core 51. Furthermore, because each retaining member 53 is an electrically insulating material, electrical connection between the magnetic plates 511 can be suppressed, thereby suppressing an increase in eddy currents generated in the armature core 51. This also suppresses an increase in iron loss in the armature core 51.

[0051] Furthermore, the cross-sectional area of ​​the tooth tip portions 572 in a plane perpendicular to the tooth protruding direction is larger than the cross-sectional area of ​​the tooth main body portions 571 in a plane perpendicular to the tooth protruding direction. The retaining members 53 are attached to the tooth main body portions 571. When the retaining members 53 are detached from the tooth portions 57 and contracted, the area of ​​the region surrounded by the retaining members 53 is smaller than the cross-sectional area of ​​the tooth main body portions 571 in a plane perpendicular to the tooth protruding direction. Therefore, the tooth tip portions 572 can prevent the retaining members 53 attached to the tooth main body portions 571 from being detached from the tooth portions 57. Furthermore, the tooth main body portions 571 can more reliably push and spread the retaining members 53 from the inside, thereby more reliably generating an elastic restoring force of the retaining members 53. Therefore, the stacked state of the multiple magnetic plates 511 can be more reliably maintained.

[0052] Furthermore, the retaining members 53 are interposed between the tooth main bodies 571 and the armature windings 52. Therefore, the retaining members 53 can ensure electrical insulation between the tooth main bodies 571 and the armature windings 52. That is, the retaining members 53 can serve both to ensure electrical insulation between the tooth main bodies 571 and the armature windings 52 and to integrate the magnetic plates 511. This eliminates the need to dispose dedicated insulating components between the tooth main bodies 571 and the armature windings 52, separate from the retaining members 53, between the tooth main bodies 571 and the armature windings 52. This reduces the number of insulating components and reduces the cost of the insulating components. Furthermore, by reducing the number of dedicated insulating components disposed in each slot 58, the space factor of the armature windings 52 in the slots 58 can be improved. This increases the torque generated by energizing the armature 5.

[0053] Furthermore, in this armature manufacturing method, in the holding member attachment step S2, the teeth 57 are inserted into the holding member 53 while stretching it, and then an elastic restoring force that fastens the teeth 57 is generated in the holding member 53. Therefore, multiple magnetic plates 511 can be easily integrated simply by inserting the teeth 57 into the holding member 53 while stretching it. This allows multiple magnetic plates 511 to be integrated without using adhesives, heat-shrinkable materials, or the like, eliminating the time required for the adhesive to harden and the heat-shrinkable materials to thermally shrink. This improves the productivity of the armature core 51. Furthermore, because each holding member 53 is an insulator with electrical insulation properties, electrical connection between the multiple magnetic plates 511 can be suppressed, thereby suppressing an increase in eddy currents generated in the armature core 51. This also suppresses an increase in iron loss in the armature core 51.

[0054] In the winding process S4, the armature winding 52 is mounted on the armature core 51 such that the holding member 53 is interposed between the armature core 51 and the armature winding 52. This reduces the number of insulating parts, thereby reducing the cost of the insulating parts. It also improves the space factor of the armature winding 52 in the slots 58, thereby increasing the torque generated by energizing the armature 5.

[0055] In the first embodiment, the first insulating film 54 and the second insulating film 55 are attached to the respective holding members 53. However, this is not limiting, and the first insulating film 54 and the second insulating film 55 may be attached directly to the armature core 51. In this case, the first insulating film 54 and the second insulating film 55 are attached to the armature core 51 by welding or the like. In addition, in this case, the first insulating film 54 and the second insulating film 55 are attached to the armature core 51 so as to face a portion of the armature core 51 adjacent to the holding members 53. That is, in this case, the first insulating film 54 is attached to the armature core 51 so as to face the inner circumferential surface of the yoke portion 56, and the second insulating film 55 is attached to the armature core 51 so as to face the side surface of the tooth tip portion 572.

[0056] Embodiment 2 Fig. 13 is an enlarged cross-sectional view showing a main part of an armature according to embodiment 2. Fig. 14 is a cross-sectional view taken along line XIV-XIV in Fig. 13. Note that the armature windings 52 are not shown in Figs. 13 and 14. The armature 5 has a plurality of bobbins 7 as insulating components. In this embodiment, the first insulating film 54 and the second insulating film 55 of embodiment 1 are not included in the armature 5. Each bobbin 7 is provided on an armature core 51.

[0057] The bobbins 7 are individually attached to the teeth 57 via holding members 53. Each bobbin 7 is made of an electrically insulating material, such as plastic or resin.

[0058] Each bobbin 7 is interposed between the tooth portion 57 and the armature winding 52, and between the inner peripheral surface of the yoke portion 56 and the armature winding 52. As a result, each bobbin 7 is interposed between the armature core 51 and the armature winding 52.

[0059] In each tooth portion 57, a holding member 53 is interposed between the tooth main body 571 and the bobbin 7. Therefore, electrical insulation between the armature core 51 and the armature winding 52 is ensured by each bobbin 7 and each holding member 53.

[0060] Each bobbin 7 has a pair of bobbin components 71. The pair of bobbin components 71 are arranged with the teeth 57 interposed therebetween in the stacking direction of the multiple magnetic plates 511. The bobbin 7 is attached to the teeth 57 with the pair of bobbin components 71 fitted into the teeth 57 via the holding members 53. The other configurations are the same as those in the first embodiment.

[0061] Next, a method for manufacturing the armature will be described. When manufacturing the armature 5, the lamination step S1 and the holding member attachment step S2 are carried out in this order, in the same manner as in the first embodiment.

[0062] Thereafter, an insulation process S3 is performed. In the insulation process S3, the bobbins 7 are individually attached to the teeth 57 via the holding members 53.

[0063] Fig. 15 is an enlarged cross-sectional view showing the state when the bobbin 7 is attached to the tooth portion 57 of Fig. 13. When attaching the bobbin 7 to the tooth portion 57 in the insulation treatment process S3, a pair of bobbin components 71 are fitted into the tooth portion 57 from both sides of the tooth portion 57 in the stacking direction of the multiple magnetic plates 511. In this way, the bobbin 7 is attached to the tooth portion 57 via the holding member 53.

[0064] After the insulation process S3, the winding process S4 is carried out. In the winding process S4, the armature winding 52 is provided on the armature core 51. At this time, the armature winding 52 is provided on the armature core 51 such that the bobbin 7 is interposed between the armature winding 52 and the armature core 51. As a result, the holding members 53 are interposed between the armature winding 52 and the teeth 57. In the present embodiment, similar to the first embodiment, the armature winding 52 is provided on the armature core 51 by winding a conductor around each tooth 57. As a result, the armature winding 52 is provided on the armature core 51 via each bobbin 7 and each holding member 53. In this manner, the armature 5 is manufactured.

[0065] In this armature 5, a bobbin 7 serving as an insulating component is attached to each tooth portion 57 via a holding member 53. Each bobbin 7 is interposed between the armature core 51 and the armature winding 52. Therefore, electrical insulation between the armature core 51 and the armature winding 52 can be ensured not only by each holding member 53 but also by each bobbin 7. This more reliably ensures electrical insulation between the armature core 51 and the armature winding 52. Furthermore, the armature winding 52 can be attached to the tooth portion 57 via the bobbin 7. This makes it easier to hold the armature winding 52 on the armature core 51. This facilitates the work of attaching the armature winding 52 to the armature core 51, further improving the productivity of the armatures 5. Furthermore, an increase in iron loss in the armature core 51 can be suppressed.

[0066] Embodiment 3 FIG. 16 is an enlarged cross-sectional view showing a main portion of an armature according to embodiment 3. Note that the armature winding 52 is not shown in FIG. 16. A plurality of bobbins 7 are provided on the armature core 51 as insulating components. Each bobbin 7 is individually attached to each tooth portion 57. Each bobbin 7 is interposed between the tooth portion 57 and the armature winding 52, and between the inner circumferential surface of the yoke portion 56 and the armature winding 52. As a result, each bobbin 7 is interposed between the armature core 51 and the armature winding 52.

[0067] The configuration of each bobbin 7 is the same as that of embodiment 2. In each bobbin 7, a pair of bobbin components 71 are arranged with the teeth 57 sandwiched between them in the stacking direction of the multiple magnetic plates 511. Each bobbin 7 is attached to the teeth 57 with the pair of bobbin components 71 directly fitted into the teeth 57.

[0068] Each holding member 53 is attached to each tooth 57 at the position of the tooth main body 571 via a part of the bobbin 7. That is, at each tooth 57, a part of the bobbin 7 is interposed between the tooth main body 571 and the holding member 53. Furthermore, each holding member 53 is interposed between the bobbin 7 and the armature winding 52. Therefore, electrical insulation between the armature core 51 and the armature winding 52 is ensured by each bobbin 7 and each holding member 53.

[0069] When the holding members 53 are attached to the teeth 57 via portions of the bobbins 7, the tooth main bodies 571 are inserted into the inside of the holding members 53 via portions of the bobbins 7. Each holding member 53 is elastically stretched by being pushed open by the tooth main bodies 571 from the inside of the holding members 53 via portions of the bobbins 7. Therefore, each holding member 53 generates an elastic restoring force that fastens the teeth 57 from around the tooth main bodies 571 via portions of the bobbins 7. As a result, each holding member 53 integrates the multiple magnetic plates 511 with the bobbins 7. In other words, each holding member 53 integrates the multiple magnetic plates 511 with the bobbins 7 by generating an elastic restoring force that fastens the teeth 57 via portions of the bobbins 7 with the bobbins 7 interposed between the holding members 53 and the teeth 57. The other configurations are the same as those in the second embodiment.

[0070] Next, a method for manufacturing the armature will be described. In this embodiment, when manufacturing the armature 5, the steps of lamination step S1, insulation step S3, holding member attachment step S2, and winding step S4 are carried out in this order. Therefore, when manufacturing the armature 5 in this embodiment, after carrying out the lamination step S1 in the same manner as in embodiment 1, the insulation step S3 is carried out before carrying out the holding member attachment step S2.

[0071] In the insulation process S3, each bobbin 7 is placed on the armature core 51. Each bobbin 7 is placed on the armature core 51 by directly attaching it to each tooth portion 57. When attaching the bobbin 7 to the tooth portion 57, a pair of bobbin components 71 are fitted into the tooth portion 57 from both sides of the tooth portion 57 in the stacking direction of the multiple magnetic plates 511. In this way, the bobbin 7 is attached to the tooth portion 57.

[0072] After the insulating process S3, a holding member attaching process S2 is performed. In the holding member attaching process S2, the holding members 53 are individually attached to the teeth 57 via a part of the bobbin 7.

[0073] 17 is an enlarged cross-sectional view showing the state when the retaining member 53 of FIG. 16 is attached to the tooth portion 57 in the retaining member attaching step S2. In the retaining member attaching step S2, as in the first embodiment, the teeth portion 57 is inserted into the retaining member 53 while stretching the retaining member 53 until the position of the retaining member 53 reaches the position of the tooth main body portion 571. Thereafter, in the retaining member attaching step S2, the retaining member 53 is attached to the tooth portion 57 by contracting the retaining member 53 using the elastic restoring force of the retaining member 53. In this way, the retaining member 53 is attached to the tooth portion 57 via a part of the bobbin 7.

[0074] When the holding member 53 is attached to the teeth 57, an elastic restoring force of the holding member 53 is applied to the teeth 57 via a portion of the bobbin 7. As a result, the holding member 53 generates an elastic restoring force that fastens the teeth 57 from around the tooth main body 571 via a portion of the bobbin 7. Therefore, the multiple magnetic plates 511 are integrated with the bobbin 7. That is, in the holding member attachment step S2, an elastic restoring force that fastens the teeth 57 via a portion of the bobbin 7 is generated in the holding member 53, thereby integrating the multiple magnetic plates 511 with the bobbin 7.

[0075] After the holding member attachment step S2, the winding step S4 is carried out. In the winding step S4, the armature winding 52 is provided on the armature core 51. At this time, the armature winding 52 is provided on the armature core 51 such that each bobbin 7 is interposed between the armature winding 52 and the armature core 51. The holding members 53 are interposed between the armature winding 52 and the teeth 57. In this embodiment, as in the first embodiment, the armature winding 52 is provided on the armature core 51 by winding a conductor around each tooth 57. In this way, the armature winding 52 is provided on the armature core 51 via each bobbin 7 and each holding member 53. In this manner, the armature 5 is manufactured.

[0076] In such an armature 5, a bobbin 7 serving as an insulating part is attached to each tooth portion 57. Each holding member 53 generates an elastic restoring force that fastens the tooth portion 57 via a portion of the bobbin 7 with a portion of the bobbin 7 interposed between the holding member 53 and the tooth portion 57, thereby integrating the magnetic plates 511 with the bobbin 7. Therefore, the effect of the second embodiment can be obtained, and the elastic restoring force of each holding member 53 can be utilized to attach each bobbin 7 to the armature core 51. This further improves the productivity of the armatures 5.

[0077] Furthermore, in this armature manufacturing method, in the holding member attachment step S2, an elastic restoring force that fastens the teeth 57 via a part of the bobbin 7 is generated in the holding member 53. Therefore, the elastic restoring force of each holding member 53 can be used to attach each bobbin 7 to the armature core 51. This further improves the productivity of the armatures 5.

[0078] Embodiment 4 FIG. 18 is an enlarged cross-sectional view showing a main portion of an armature according to the fourth embodiment. Note that the armature windings 52 are not shown in FIG. 18. The armature 5 has a plurality of insulating films 8 as insulating components. In this embodiment, the first insulating film 54 and the second insulating film 55 of the first embodiment are not included in the armature 5. Each insulating film 8 is provided on the armature core 51. Each insulating film 8 is made of an electrically insulating material.

[0079] A pair of insulating films 8 is individually attached to each tooth portion 57. Each insulating film 8 overlaps the outer peripheral surface of the tooth portion 57 and the inner peripheral surface of the yoke portion 56. Therefore, each insulating film 8 is interposed between the tooth portion 57 and the armature winding 52, and between the inner peripheral surface of the yoke portion 56 and the armature winding 52. As a result, each insulating film 8 is interposed between the armature core 51 and the armature winding 52.

[0080] Each holding member 53 is attached to each tooth 57 at the position of the tooth main body 571 via a pair of insulating films 8. That is, at each tooth 57, a portion of the insulating film 8 is interposed between the tooth main body 571 and the holding member 53. Furthermore, each holding member 53 is interposed between the insulating film 8 and the armature winding 52. Therefore, electrical insulation between the armature core 51 and the armature winding 52 is ensured by each insulating film 8 and each holding member 53.

[0081] When the holding members 53 are attached to the teeth 57 via portions of the insulating film 8, the tooth main bodies 571 are inserted into the inside of the holding members 53 via portions of the insulating film 8. Each holding member 53 is elastically stretched by being pushed open by the tooth main bodies 571 from the inside of the holding members 53 via portions of the insulating film 8. Therefore, each holding member 53 generates an elastic restoring force that clamps the teeth 57 from around the tooth main bodies 571 via portions of the insulating film 8. As a result, each holding member 53 integrates the multiple magnetic plates 511 with the insulating films 8. In other words, each holding member 53 generates an elastic restoring force that clamps the teeth 57 via portions of the insulating film 8 with portions of the insulating film 8 interposed between the holding members 53 and the teeth 57, thereby integrating the multiple magnetic plates 511 with the insulating films 8. The other configurations are the same as those in the third embodiment.

[0082] Next, a method for manufacturing the armature will be described. In this embodiment, when manufacturing the armature 5, the lamination process S1, the insulation process S3, the holding member attachment process S2, and the winding process S4 are carried out in this order, as in the third embodiment.

[0083] In the insulation process S3, a plurality of insulating films 8 are arranged on the armature core 51. Each insulating film 8 is arranged on the armature core 51 by being directly attached to each tooth portion 57. At this time, the pair of insulating films 8 attached to the tooth portion 57 are temporarily held to the tooth portion 57 by a holder or the like.

[0084] After the insulating process S3, a holding member attaching process S2 is performed. In the holding member attaching process S2, the holding members 53 are individually attached to the teeth 57 with a part of the insulating film 8 interposed therebetween.

[0085] 19 is an enlarged cross-sectional view showing the state when holding member 53 of FIG. 18 is attached to tooth portion 57 in holding member attachment step S2. In holding member attachment step S2, similar to embodiment 3, teeth portion 57 are inserted into holding member 53 while holding member 53 is stretched, and then holding member 53 is contracted by the elastic restoring force of holding member 53. As a result, holding member 53 is attached to teeth portion 57 via part of insulating film 8.

[0086] When the holding members 53 are attached to the teeth 57, the elastic restoring force of the holding members 53 is applied to the teeth 57 via a portion of the insulating film 8. As a result, the holding members 53 generate an elastic restoring force that fastens the teeth 57 from around the tooth main bodies 571 via a portion of the insulating film 8. Therefore, the magnetic plates 511 are integrated with the insulating films 8. That is, in the holding member attachment step S2, the holding members 53 generate an elastic restoring force that fastens the teeth 57 via a portion of the insulating film 8, thereby integrating the magnetic plates 511 with the insulating films 8. A holder or the like that holds the insulating films 8 to the teeth 57 is removed from the armature core 51 after the magnetic plates 511 are integrated with the insulating films 8 by the holding members 53. The subsequent procedures are the same as those in the third embodiment.

[0087] In this way, even if a plurality of insulating films 8 are used as insulating components instead of a plurality of bobbins 7, it is possible to more reliably ensure insulation between the armature core 51 and the armature winding 52. Furthermore, since it is no longer necessary to attach each insulating film 8 to the armature core 51 by welding or the like, it is possible to further improve the productivity of the armatures 5.

[0088] In each of the above-described embodiments, the retaining members 53 are attached only to the tooth main body portions 571 of the tooth portions 57. However, this is not limiting. For example, the retaining members 53 may be attached not only to the tooth main body portions 571 but also to the tooth tip portions 572. In this case, each retaining member 53 is interposed between the entire tooth portion 57 and the armature winding 52. This makes it possible to more reliably maintain the integrated state of the multiple magnetic plates 511. In other words, it is sufficient that each retaining member 53 is interposed between at least a portion of the tooth portion 57 and the armature winding 52.

[0089] In each of the above embodiments, the cross-sectional area of ​​each tooth tip portion 572 in a plane perpendicular to the tooth protrusion direction is larger than the cross-sectional area of ​​each tooth main body portion 571 in a plane perpendicular to the tooth protrusion direction. However, this is not limited to this. For example, the cross-sectional area of ​​each tooth tip portion 572 in a plane perpendicular to the tooth protrusion direction may be the same as the cross-sectional area of ​​each tooth main body portion 571 in a plane perpendicular to the tooth protrusion direction. Furthermore, the cross-sectional area of ​​each tooth tip portion 572 in a plane perpendicular to the tooth protrusion direction may be smaller than the cross-sectional area of ​​each tooth main body portion 571 in a plane perpendicular to the tooth protrusion direction.

[0090] In each of the above-described embodiments, the armature winding 52 is wound around each of the teeth 57. However, this is not limitative. For example, the armature winding 52 may be formed by a conductor disposed in each of the slots 58, rather than being wound around each of the teeth 57.

[0091] In each of the above-described embodiments, the annular armature 5 is used as the armature of the rotating electric machine 1, which is an electric device. However, this is not limiting, and for example, a linear armature 5 may be used as the armature of a linear motor, which is an electric device. In this case, the mover moves along the armature 5 due to movement of a magnetic field generated by energizing the armature winding of the armature 5.

[0092] The configurations described in the above embodiments are merely examples of the contents of the present disclosure. The embodiments can be combined with other known technologies. Part of the configuration of the embodiments can be omitted or modified without departing from the gist of the present disclosure.

[0093] Examples of aspects that may be included in the present disclosure are set forth below as appendices. (Appendix 1) an armature core formed by laminating a plurality of magnetic plates; a plurality of holding members provided on the armature core and integrating the plurality of magnetic plates; an armature winding provided in the armature core; Equipped with the armature core has a yoke portion and a plurality of teeth portions provided on the yoke portion at intervals from one another, Each of the holding members is formed endlessly from an electrically insulating elastic material, The retaining member is individually attached to each of the teeth, Each of the holding members generates an elastic restoring force that tightens the teeth when the teeth are inserted inside the holding member, thereby integrating the multiple magnetic plates into an armature. (Appendix 2) Each of the teeth has a tooth main body portion protruding from the yoke portion and a tooth tip portion provided at a protruding end of the tooth main body portion, the retaining member is attached to the tooth main body, a direction in which the tooth main body portion protrudes from the yoke portion is defined as a tooth protruding direction, a cross-sectional area of ​​the tooth tip portion in a plane perpendicular to the tooth protruding direction is larger than a cross-sectional area of ​​the tooth main body portion in a plane perpendicular to the tooth protruding direction, An armature as described in Appendix 1, wherein when the retaining member is detached from the tooth portion and contracted, the area of ​​the region surrounded by the retaining member is smaller than the cross-sectional area of ​​the tooth main body portion in a plane perpendicular to the tooth protruding direction. (Appendix 3) 3. The armature according to claim 1, wherein each of the holding members is interposed between at least a portion of the tooth portion and the armature winding. (Appendix 4) an insulating part formed of an electrically insulating material; the insulating component is interposed between the armature core and the armature winding, 4. The armature according to claim 1, wherein each of the retaining members generates an elastic restoring force that fastens the tooth portion via a portion of the insulating component with a portion of the insulating component interposed between the retaining member and the tooth portion, thereby integrating the plurality of magnetic plates with the insulating component. (Appendix 5) a lamination step of laminating a plurality of magnetic plates to form an armature core having a yoke portion and a plurality of teeth portions provided on the yoke portion at intervals from one another; a holding member attaching step of attaching endless holding members made of an electrically insulating elastic material to each of the teeth, after the laminating step; a winding step of providing an armature winding on the armature core after the holding member attaching step; Equipped with In the holding member mounting process, the tooth portion is inserted into the inside of the holding member while stretching the holding member, and then an elastic restoring force that tightens the tooth portion is generated in the holding member, thereby integrating the multiple magnetic plates. (Appendix 6) 6. The method of manufacturing an armature according to claim 5, wherein in the winding step, the armature winding is provided on the armature core so that the holding member is interposed between the armature winding and the teeth portion. (Appendix 7) an insulating process step of arranging an insulating part made of an electrically insulating material on the armature core after the laminating process and before the holding member attaching process; In the holding member attaching step, an elastic restoring force that fastens the teeth portion via a part of the insulating component is generated in the holding member, thereby integrating the plurality of magnetic plates with the insulating component, 7. The method for manufacturing an armature according to claim 5, wherein in the winding step, the armature winding is provided on the armature core such that the insulating component is interposed between the armature core and the armature winding. [Explanation of symbols]

[0094] 5 Armature, 7 Bobbin (insulating part), 8 Insulating film (insulating part), 51 Armature core, 52 Armature winding, 53 Holding member, 56 Yoke portion, 57 Teeth portion, 511 Magnetic plate, 571 Teeth main body portion, 572 Teeth tip portion.

Claims

1. an armature core formed by laminating a plurality of magnetic plates; a plurality of holding members provided on the armature core and integrating the plurality of magnetic plates; an armature winding provided in the armature core; Equipped with the armature core has a yoke portion and a plurality of teeth portions provided on the yoke portion at intervals from one another, Each of the holding members is formed endlessly from an electrically insulating elastic material, The retaining member is individually attached to each of the teeth, Each of the holding members generates an elastic restoring force that tightens the teeth when the teeth are inserted inside the holding member, thereby integrating the multiple magnetic plates into an armature.

2. Each of the teeth has a tooth main body portion protruding from the yoke portion and a tooth tip portion provided at a protruding end of the tooth main body portion, the retaining member is attached to the tooth main body, a direction in which the tooth main body portion protrudes from the yoke portion is defined as a tooth protruding direction, a cross-sectional area of ​​the tooth tip portion in a plane perpendicular to the tooth protruding direction is larger than a cross-sectional area of ​​the tooth main body portion in a plane perpendicular to the tooth protruding direction, 2. The armature according to claim 1, wherein when the retaining member is detached from the tooth portion and contracted, the area of ​​the region surrounded by the retaining member is smaller than the cross-sectional area of ​​the tooth main body portion in a plane perpendicular to the tooth protruding direction.

3. 3. The armature according to claim 1, wherein each of the holding members is interposed between at least a portion of the tooth portion and the armature winding.

4. an insulating part formed of an electrically insulating material; the insulating component is interposed between the armature core and the armature winding, 3. The armature according to claim 1, wherein each of the retaining members generates an elastic restoring force that fastens the tooth portion through a portion of the insulating component with a portion of the insulating component interposed between the retaining member and the tooth portion, thereby integrating the plurality of magnetic plates with the insulating component.

5. a lamination step of laminating a plurality of magnetic plates to form an armature core having a yoke portion and a plurality of teeth portions provided on the yoke portion at intervals from one another; a holding member attaching step of attaching endless holding members made of an electrically insulating elastic material to each of the teeth, after the laminating step; a winding step of providing an armature winding on the armature core after the holding member attaching step; Equipped with In the holding member mounting process, the tooth portion is inserted into the inside of the holding member while stretching the holding member, and then an elastic restoring force that tightens the tooth portion is generated in the holding member, thereby integrating the multiple magnetic plates.

6. 6. The method for manufacturing an armature according to claim 5, wherein in the winding step, the armature winding is provided on the armature core such that the holding member is interposed between at least a part of the teeth and the armature winding.

7. an insulating process step of arranging an insulating part made of an electrically insulating material on the armature core after the laminating process and before the holding member attaching process; In the holding member attaching step, an elastic restoring force that fastens the teeth portion via a part of the insulating component is generated in the holding member, thereby integrating the plurality of magnetic plates with the insulating component, 7. The method for manufacturing an armature according to claim 5, wherein in the winding step, the armature winding is provided on the armature core such that the insulating component is interposed between the armature core and the armature winding.

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